1955—2008年渭北旱塬地区气候变化特征-陕西师范大学学报期刊社网站

陕西师范大学学报（自然科学版）

资源与环境科学

1955—2008年渭北旱塬地区气候变化特征

孟丹丹1，殷淑燕1*，张参2，王德丽1

（1陕西师范大学旅游与环境学院，陕西西安 710062； 2 西北大学地质学系，陕西西安 710069）

孟丹丹，女，硕士研究生，研究方向为土地资源开发与环境演变.* 通信作者：殷淑燕，女，副教授.E-mail:yinshuyan@163.com.

摘要:

利用渭北旱塬地区5个县（市）1955—2008年的年平均气温、极端高温、极端低温、年总降水、日照时数等实测资料，采用线性分析、趋势线分析、5 a滑动平均等方法，对渭北旱塬地区的气候变化特征进行分析.结果表明：(1)近54 a来渭北旱塬地区气温呈现波动上升趋势，以025℃/10 a的速度增加，上升趋势较明显，在90年代气温的相对变率最大；(2)降水以695 mm/10 a的变化率在减少，共出现6个少雨年份和7个多雨年份；(3)年日照时数以702 h/10 a的变化率在减少.由以上分析得出渭北旱塬地区的气候呈现暖干化趋势.

关键词：

渭北旱塬地区；气温；降水；日照时数；气候变化

收稿日期：

2009-02-26

中图分类号：

P467

文献标识码：

文章编号：

1672-4291(2010)04-0099-05

基金项目：

国家自然科学基金资助项目(40571154，40871052)；国家社会科学基金资助项目(04BZS022）；陕西师范大学国家“211工程”资助三期重点建设项目

Doi:

Characteristic of climate change in Weibei dryland from 1955 to 2008

MENG Dan-dan1，YIN Shu-yan1*，ZHANG Can2，WANG De-li1

(1 College of Tourism and Environment，Shaanxi Normal University， Xi′an 710062，Shaanxi，China；2 Geology Department，Northwest University，Xi′an 710069，Shaanxi，China )

Abstract:

Based on observed data of annual average temperature, extremely high temperature, extremely low temperature and the total precipitation as well as sunshine durations in five counties of Weibei dryland from 1955 to 2008, the characteristics of climate change in Weibei dryland were analyzed by means of linear analysis,trend line analysis and 5-year moving average.Results showed that (1)The temperature in Weibei dryland showed wavelike rises at the average value of 0.25 ℃ per 10 years for recent 54 years, which seem to be the obvious increasing trend. Moreover, the relative variability of temperature is the largest in the 1990s. (2) The rate of the precipitation decreasing is 695 mm per 10 years, and in total, there are 6 infrequent rain years and 7 frequent rain years. (3) The rate of the sunshine durations decreasing is 702 hours per 10 years. To sum up, the climate in Weibei dryland appeared a warming and drying trend.

KeyWords:

Weibei dryland；temperature；precipitation；sunshine duration；climatic change